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annotate src/dmgrowbuf.h @ 1697:1036b0dcccb5

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Refactor DMGrowBuf so that there can be buffers that grow "backwards". This also removes some support functions like the buffer state push/pop.
author Matti Hamalainen <ccr@tnsp.org>
date Tue, 05 Jun 2018 12:55:17 +0300
parents e568535e1a96
children f71cd6691e05
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1 /*
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2 * DMLib
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3 * -- Growable buffer implementation
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4 * Programmed and designed by Matti 'ccr' Hamalainen
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5 * (C) Copyright 2018 Tecnic Software productions (TNSP)
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6 */
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7 #ifndef DMGROWBUF_H
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8 #define DMGROWBUF_H
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9
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10 #include "dmlib.h"
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11
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12 #ifdef __cplusplus
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13 extern "C" {
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14 #endif
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15
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16
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17 typedef struct
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18 {
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19 Uint8
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20 *data; // Actually allocated data pointer
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21
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22 size_t
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23 offs, // Current offset
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24 min_offs,
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25 max_offs,
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26 size, // Actual allocated size
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27 len, // Size requested
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28 mingrow; // Minimum amount of bytes the allocation size grows by
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29
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30 BOOL
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31 allocated, // TRUE if this structure itself has been allocated and can be freed, FALSE if static
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32 backwards, // TRUE if the buffer grows backwards (e.g. "offs" moves backwards)
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33 literal; // TRUE if dmGrowBufPut*() functions stores data "literally" in backwards mode
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34 } DMGrowBuf;
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35
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36
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37 int dmGrowBufInit(DMGrowBuf *buf);
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38 int dmGrowBufAlloc(DMGrowBuf *buf, const size_t initial, const size_t mingrow);
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39 int dmGrowBufNew(DMGrowBuf **pbuf, const size_t initial, const size_t mingrow);
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40 void dmGrowBufFree(DMGrowBuf *buf);
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41
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42 BOOL dmGrowBufGrow(DMGrowBuf *buf, const size_t amount);
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43 BOOL dmGrowBufCheckGrow(DMGrowBuf *buf, const size_t nsize);
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44
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45 BOOL dmGrowBufPut(DMGrowBuf *buf, const Uint8 *data, const size_t len);
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46 BOOL dmGrowBufPutU8(DMGrowBuf *buf, const Uint8 value);
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47 BOOL dmGrowBufPutU16BE(DMGrowBuf *buf, const Uint16 val);
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48 BOOL dmGrowBufPutU16LE(DMGrowBuf *buf, const Uint16 val);
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49 BOOL dmGrowBufPutU32BE(DMGrowBuf *buf, const Uint32 val);
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50 BOOL dmGrowBufPutU32LE(DMGrowBuf *buf, const Uint32 val);
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51
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52
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53 #ifdef __cplusplus
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54 }
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55 #endif
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56
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57 #endif // DMGROWBUF_H